Green screen at bootup in the amiga 500, 1200 and some others refer to a chip ram problem. As you said it is a 4000, perhaps is referring to another problem, but having the 4000 the same kick (3.0 and 3.1), and being an Amiga i think that it surely is a chip ram problem.
Any lucky 4000 owner on this board can give a hand?.
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